AL Chemistry Discussion

Newcastle Fans · 發表於 2005-2-27 20:59:09

Originally posted by bobby_zamora at 2005-2-27 20:54:

in fact
i forget almost all chemistry now...
this is not organic...?
it is chemistry and socieity..(as it is an AA)

應該係organic
講reactions... 同埋natural source

bobby_zamora · 發表於 2005-2-27 21:00:32

Originally posted by Newcastle Fans at 2005-2-27 08:59 PM:

應該係organic
講reactions... 同埋natural source

induced-iduced.......
hydrogen..bond?

Newcastle Fans · 發表於 2005-2-27 21:01:08

Originally posted by bobby_zamora at 2005-2-27 20:54:
BTW..
it is better to do more than 1x yrs past paer

93之前... 好多都out syl喎

Newcastle Fans · 發表於 2005-2-27 21:02:32

Originally posted by bobby_zamora at 2005-2-27 21:00:

induced-iduced.......
hydrogen..bond?

no...
我諗係講reaction of carboxylic acid and secondary amine...
同埋dipeptide formation囉
不過我未睇marking scheme呀

bobby_zamora · 發表於 2005-2-27 21:03:27

Originally posted by Newcastle Fans at 2005-2-27 09:01 PM:

93之前... 好多都out syl喎

but still worth to see...

bobby_zamora · 發表於 2005-2-27 21:04:44

Originally posted by Newcastle Fans at 2005-2-27 09:02 PM:

no...
我諗係講reaction of carboxylic acid and secondary amine...
同埋dipeptide formation囉
不過我未睇marking scheme呀

xxx
i see source to force....

talk its formation ar
synthesis lor

bobby_zamora · 發表於 2005-2-27 21:05:50

Originally posted by Newcastle Fans at 2005-2-27 09:01 PM:

93之前... 好多都out syl喎

and you will find a lot of stuffs that you have missed out/ never appear on bks which however in syl...

bobby_zamora · 發表於 2005-2-27 21:07:02

Originally posted by bobby_zamora at 2005-2-27 09:05 PM:

and you will find a lot of stuffs that you have missed out/ never appear on bks which however in syl...

esp in inorganic chem

有好多trend that you never seen and you dun know how to answer/answer that can get marks

Newcastle Fans · 發表於 2005-2-27 21:21:04

原來我真係冇98既MS...

bobby_zamora · 發表於 2005-2-27 21:24:27

Originally posted by Newcastle Fans at 2005-2-27 09:21 PM:
原來我真係冇98既MS...

seach for FTP

青蛙仔 · 發表於 2005-3-1 12:11:51

如果佢叫你plot 2幅graph..
explain個equation C->D 係second order better than first order..
咁應該畫邊2幅?!

Given : different [C] at different time

Newcastle Fans · 發表於 2005-3-1 12:28:56

Originally posted by 青蛙仔 at 2005-3-1 12:11:
如果佢叫你plot 2幅graph..
explain個equation C->D 係second order better than first order..
咁應該畫邊2幅?!

Given : different [C] at different time

1 / [C] Vs time ------> straight line
ln {[C](initial) / [C]} Vs time ---------> not straight line

bobby_zamora · 發表於 2005-3-1 14:30:24

Originally posted by Newcastle Fans at 2005-3-1 12:28 PM:

1 / [C] Vs time ------> straight line
:ln {[C](initial) / [C]} Vs time ---------> not straight line

ging

Newcastle Fans · 發表於 2005-3-1 14:38:31

Originally posted by bobby_zamora at 2005-3-1 14:30:

ging

背野jea

Newcastle Fans · 發表於 2005-3-2 17:18:13

大家會點記monosaccharides既structures

beckham312oo · 發表於 2005-3-3 02:14:29

Originally posted by 青蛙仔 at 2005-3-1 12:11 PM:
如果佢叫你plot 2幅graph..
explain個equation C->D 係second order better than first order..
咁應該畫邊2幅?!

Given : different [C] at different time

if 有讀pure 的話勸你即刻derive 出黎(因唔會記錯+/-同3秒就derive 到的)

e.g 1st order rate=-d[A]/dt
by rate equation,rate=k[A] =>-d[A]/dt=k[A]
=>kdt=-d[A]/[A] (in 個dx/x=lnx)

2邊take integral sign,由initial t in到t infinity,
=>kt=ln[A]-ln[Ao]

zero,2nd order 都係可similar 咁derive 出黎如果讀過a math

[ Last edited by beckham312oo on 3-3-2005 at 02:18 AM ]

Newcastle Fans · 發表於 2005-3-3 14:05:45

又係呢個問題...
"carcinogenic"係可能致癌定係可以致癌?

bobby_zamora · 發表於 2005-3-3 18:14:39

Originally posted by Newcastle Fans at 2005-3-3 02:05 PM:
又係呢個問題...
"carcinogenic"係可能致癌定係可以致癌?

i think is 可以

bobby_zamora · 發表於 2005-3-13 01:02:30

水靜河飛

Newcastle Fans · 發表於 2005-3-14 16:44:50

呢兩年organic難左勁多... 你地有乜野對策

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